This article is about actual problem of unsatisfactory work of system of heating of cycle air on GPA-32 Ladoga compressor unit on CS-48: there were emergency stops, caused by insufficient heating of inlet air of axial compressor.

The processes of incrustation are caused by huge amounts of dissolved salts in the heat medium. When being exploited the evaporation of the heat medium leads to the ion concentration in it and reaches its satiation. Further increase of the ion concentration leads to scaling. Heated shielding pipes are subjected to scaling more than any other elements of the heat generator.

The article analyzes the methodology and specifics of conducting local monitoring and qualitative characteristics of extracted groundwater in the system of PJSC "Gazprom" and OOO "Gazprom transgaz Ukhta" as of January 1, 2015 based. On the basis of the analysis appropriate recommendations are given.

Summarized the reasons for the violation of the dynamic stability of the drill string in the drilling process. The conditions for vibration-free running of the drill string. It is shown experimentally that oscillatory processes in the electrical drive–drill string adequately describes the two-mass model, which allows the development of the structure of electromechanical systems effectively damping oscillations of the drill string due to the capabilities of the drive.

Posts in category RES. 2015. Issue 2

In the article considered the possibility of increasing the effectiveness of methods of technical diagnostics equipment such as compressors, which is used as an electric induction motor with squirrel-cage rotor. The essence of the process lies in the manifestation of disturbances on the part of the mechanical part of the machine in the stator of the motor current signal. This effect can be the basis of effective methods of equipment diagnosis, that is characterized by high precision and practicality. Using the software package Matlab version 7.10.0.499 (R2010a) made simulations of the stator current of the motor fluctuations that occur due to the occurrence of oscillations of torque on the motor shaft due to the birth and development of mechanical defects. Simulation model of induction motor based on a system of differential equations that describe the electromechanical energy conversion in an asynchronous machine, expressed in the x, y coordinate a speed of the rotor flux. This structure is complemented by a set of model units defining fluctuations in torque on the shaft.

This paper considers the problem of prediction the parameters of physical-geological model of the environment for heterogeneous environments based on a synthesis of the principles of fuzzy inference and models of scattering. The heterogeneity of the environment is presented in the form of scattering parameters, which implements the model prediction. The prediction of parameters is replaced with the prediction of their stray fields. We consider the calculation of the approximation of the membership function on the example of 3-dimensional relationships.

The material consists of several parts. In this part of the work on the concentration of static and dynamic stresses from impulse actions aiming at the destruction of solid colmatant in the environment shows the role of the total field.

The article gives the assessment and the comparative characteristic of ecological economic balance of the northern regions of the Komi Republic. The sizes are determined and the main types of environmental management are characterized. The assessment of the biospheric status, the forecast of development of the biospheric situation and the recommendation about preservation of biospheric balance are given.

In the article the case of estimation of the tense state of gas and oil pipelineis considered at the flat tense state, when initial parameters: pressure, diameter, thicknesses of wall of pipe, tensile of pipe steel strength normally up-diffused. At these terms a mathematical model is got for probability not offensives of the maximum state of gas and oil pipelines on the criterion of durability. The sensitiveness of reliability is investigational to changeability of initial calculation parameters, that promoted safety of exploitation of gas and oil pipelines.

The article identifies four interval limit values of the coefficient of displacement, each of which offers a set of measures aimed at bringing the casing to TD wells under its own weight. It is shown that in the process of drilling, according to inclination can evaluate the quality of the trunk, as well as to identify intervals to be elaborated.

The paper deals with the influence of the geometric dimensions deviations gas pipes from the nominal values on the hoop stresses resulting from the long-term operation of trunk pipelines. The results of the geometric monitoring of pipes, exhaust more than 25 years as part of the main gas pipelines in the Far North. According to the thickness measurement set geometric dimensions deviations from the nominal values and maximum values are defined hoop stresses in the pipe wall.

The article presents the main trends in the application of bank cards in modern conditions. Moreover, the characteristic handling of bank cards in the Republic of Komi on the example of the Komi branch No. 8617 of the Sberbank of Russia.

The article presents the basic concepts and indicators for assessing investment projects, the calculation of basic investment resources, the financial performance of the organization. The methods of determining cash flows, and an example of calculation of the main indicators for assessing the effectiveness of the investment project.

According to the company Gazprom at the moment the forecast resources of methane in the major coal basins of Russia are estimated at 83.7 trillion m3, which corresponds to about one third of forecast natural gas resources of the country. The heat of combustion of coal-bed methane and natural gas are almost identical, so these gases are mutually interchangeable, as both a chemical feedstock and energy sources. The article presents an overview and analysis of the use of coal mine methane at Vorkutsky field.

The article discusses the solution of linear programming problem by means of simulation. When implementing this method, it is possible to consider special cases inherent to the linear programming problem: given the wobble hypothesis, the availability of alternative solutions, the unboundedness of the domain of definition, the lack of feasible solutions.

The article gives an analysis of the planned and real operating practices of the Usa – Ukhta and Ukhta – Yaroslavl main pipelines, the graphs of pressure and temperature of oil are calculated with the help of NIPAL, PIPESIM programs, a comparison with the actual data is conducted.

The Bolivarian Republic of Venezuela is a major producer and consumer of hydrocarbons in the world. Engineering and economical feasibility of the need and construction possibility of a system of underground gas storage facilities to cover the uneven production and consumption was carried out as part of the development of gas reserves in the country for the medium and long term.